Eupelmidae

Definition

A family of minute parasitic wasps in the superfamily Chalcidoidea (order Hymenoptera), characterized by larvae that develop as primary parasitoids—most commonly attacking beetle larvae, but also recorded from spiders and diverse other arthropod hosts. Life-history strategies vary considerably across the family. Members are cosmopolitan and occur in virtually all terrestrial habitats.

Etymology

From Eupelmus (type genus), from Greek eu- 'well' + pelma 'sole of the foot', referring to a morphological feature of the type genus; + -idae (family suffix)

Example

Eupelmus urozonus, a widespread eupelmid, parasitizes larvae of weevils (Curculionidae) in stored grain and field crops; other eupelmids such as Anastatus attack spider eggs or caterpillar eggs in forest canopies.

Synonyms

• copper wasps (common name)

Related Terms

• Chalcidoidea
• Parasitoid
• primary parasitoid
• Eupelmus
• Hymenoptera
• Biological control
• hyperparasitoid
• idobiont

Usage Notes

The common name 'copper wasps' refers to metallic coloration in some species but is not universally applied. Eupelmidae is morphologically diverse; some members have reduced wings or modified hind legs for jumping. The family is frequently encountered in agricultural biological control research due to its broad host range among pest insects. Distinguish from other chalcidoid families (Encyrtidae, Eulophidae, Pteromalidae) by detailed wing venation and antennal structure, which require microscopic examination.